[cairo] Cairo 1.4.10 and maemo (multi-thread text rendering)
behdad at behdad.org
Sun Aug 19 15:54:55 PDT 2007
On Fri, 2007-08-17 at 23:10 +0200, David Turner wrote:
> By the way, wasn't Behad in the process of integrating my patch a few weeks ago ?
I started reviewing it when traveling, but then got distracted by
conferences and other stuff. I'll pick it up again, but it's 1.6
> Are there still some blocking problems (fontconfig pattern usage) ?
You said the fontconfig pattern usage doesn't have to change with your
patch, so that's an orthogonal issue.
> May I help with the integration ?
There's one bug about race conditions with your patch submitted to
bugzilla. Helps if you can check that out.
> - David
> On Fri, 17 Aug 2007 19:51:36 +0200 (CEST), "Jan Slupski" <jslupski at juljas.net> said:
> > On Fri, 17 Aug 2007, Behdad Esfahbod wrote:
> > >> Preliminary versions of that cache, (during 1.3.x development), did
> > >> cause problems with multi-thread text rendering, but we didn't put the
> > >> cache into any released version of cairo until all known problems were
> > >> fixed.
> > >
> > > In fact 1.4.8 was shipped with a slightly broken patch too. But 1.4.10
> > > should be all good.
> > >
> > > We are planning to do another stable release in a couple or more weeks,
> > > stay tuned.
> > Hi,
> > I know nothing about maemo, so I'm not sure if that information is at
> > all relevant, but if maemo uses FreeType font engine (via Cairo) for
> > text rendering, any multithread usage is quite a risk unless David
> > Turner's patches are applied.
> > For more information see here:
> > http://lists.freedesktop.org/archives/cairo/2007-April/010289.html
> > http://lists.freedesktop.org/archives/cairo/2007-February/thread.html#9512
> > thread
> > Moreover, I have report (but couldn't reproduce to prepare a bug report),
> > that, WITH David Turner patches, under high load threads are sometimes
> > deadlocking.
> > BTW, there is one more still not resolved issue in win32 environment -
> > usage of single DC for all win32 threads:
> > http://lists.freedesktop.org/archives/cairo/2007-February/009619.html
> > Regards,
> > Jan Slupski
> > _ _ _ _ _____________________________________________
> > | |_| |\ | S L U P S K I jslupski at juljas.net
> > |_| | | | \| http://juljas.net/
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